Air outlet mechanism of film blowing machine

Abstract

The utility model relates to the technical field of packaging bag production equipment, in particular to an air outlet mechanism of a film blowing machine, which comprises an annular main body, a binding ring, a stand column and an air ring, an air nozzle is arranged at the bottom of the annular main body, an air outlet is arranged on the inner side of the annular main body, a ventilation cavity is arranged in the annular main body, and the air outlet is communicated with the air nozzle through the ventilation cavity. The bundling ring is formed on the top face of the annular body and surrounds an opening in the middle of the annular body, the bottom end of the stand column is connected with the annular body, the stand column is vertically arranged, an installation piece is arranged on the stand column, the stand column penetrates through the installation piece, and the installation piece can move in the height direction of the stand column to form a moving pair with the stand column. The inner side of the air ring is a connecting part with an inclined middle part, the inner side of the air ring is an air blocking part, the outer side of the air ring is a guide part, the air ring regularly changing through the air blocking part and the guide part guides airflow, makes up the flow velocity difference of upward conveying of the airflow, can ensure rapid expansion of the film, and has practical significance and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag production equipment, and in particular to an air outlet mechanism for a blown film machine. Background Technology

[0002] Film blowing machines are a type of equipment used in the existing technology for producing films and plastic bags. They heat and melt plastic particles, and then extrude and blow them into films. They are widely used in the plastic products processing industry and can produce film materials of various specifications and thicknesses.

[0003] The die head of a blown film machine can inflate a film using an upward airflow. However, as the film gradually expands, the tension of the upward airflow on the inner wall of the film gradually decreases, making it impossible to inflate the film quickly and uniformly (this technical problem is also mentioned in the background art of application number 202220628588.5, which describes an inflating device for a blown film machine). The purpose of this utility model is to propose a mechanism for a blown film machine to solve the above-mentioned technical problem. Utility Model Content

[0004] The purpose of this invention is to provide an air outlet mechanism for a blown film machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes an annular body, a converging ring, a column, and a wind ring. A nozzle is provided at the bottom of the annular body for communication with an external fan. An air outlet is provided on the inner side of the annular body. A ventilation cavity is formed inside the annular body, and the air outlet communicates with the nozzle through the ventilation cavity. The converging ring forms an opening on the top surface of the annular body surrounding the middle of the annular body. The bottom end of the column is connected to the annular body. The column is vertically positioned, and an mounting plate is provided on the column. The column passes through the mounting plate, and the mounting plate can move along the height direction of the column, forming a sliding pair with the column. A nut is provided at the top of the column and threadedly connected to the column. The wind ring is connected to the mounting plate through a first connecting strip. The inner side of the wind ring has an inclined connecting part in the middle, a windbreak part, and a guide part.

[0006] To optimize the above technical solution, the following measures are further taken: the air outlet is annular to ensure that the airflow can act on the windbreak part of the air ring after leaving the air outlet, so as to ensure that the film can be quickly inflated.

[0007] As a further improvement to the above technical solution, it also includes a spring, which is located between adjacent mounting plates. The purpose of the spring is to create a gap between adjacent air rings to avoid the air rings being too tight and thus restricting airflow. In addition, the spacing of the air rings can be changed by adjusting the position of the screw and nut on the column, and the spring can make each mounting plate keep the spacing consistent.

[0008] As a further improvement to the technical solution: the width of the guide section gradually decreases from top to bottom along the height of the column. The purpose is to enable the airflow above the column to drive the membrane to expand through the guide section, reduce the distance between the guide section and the membrane, and reduce airflow loss to compensate for the velocity difference of the airflow during its upward movement along the column.

[0009] As an improvement to the aforementioned technical solution: the width of the windbreak gradually decreases from top to bottom along the height of the column. The purpose of this design is to enable the windbreak to block and replenish more airflow, allowing the airflow to laterally drive the membrane to expand, thereby compensating for the velocity difference of the airflow as it travels up the column.

[0010] Furthermore, the bottom of the column is connected to the ring-shaped main body through equally spaced second connecting strips, the axis of the column coincides with the axis of the ring-shaped main body, and the radial second connecting strips provide good support stability for the column.

[0011] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages:

[0012] This utility model provides an air outlet mechanism for a blown film machine. By using a regularly changing air ring in the windbreak and guide sections, the airflow is guided to compensate for the velocity difference in the upward transport of the airflow, thus ensuring rapid expansion of the film. This has practical significance and promotional value. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the side structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0017] In the diagram: Ring-shaped main body-1, air nozzle-101, air outlet-102, ventilation cavity-103, converging ring-2, column-3, mounting plate-301, nut-302, second connecting strip-303, air ring-4, first connecting strip-401, connecting part-402, windproof part-403, guide part-404, spring-5 Detailed Implementation

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example

[0020] Please see Figure 1-3 This utility model provides an air outlet mechanism for a blown film machine, including an annular body 1, a gathering ring 2, a column 3, an air ring 4, and a spring 5. An air nozzle 101 is provided at the bottom of the annular body 1, which is used to communicate with an external fan. An annular air outlet 102 is provided on the inner side of the annular body 1. A ventilation cavity 103 is provided inside the annular body 1, and the air outlet 102 is connected to the air nozzle 101 through the ventilation cavity 103.

[0021] The converging ring 2 is formed on the top surface of the annular body 1, surrounding the opening in the middle of the annular body 1.

[0022] The bottom end of the column 3 is connected to the annular body 1. The column 3 is vertically set and a mounting plate 301 is set on the column 3. The column 3 passes through the mounting plate 301 and the mounting plate 301 can move along the height direction of the column 3 to form a sliding pair with the column 3. The top end of the column 3 is set with a nut 302 that is threadedly connected to the column 3. The bottom end of the column 3 is connected to the annular body 1 through the second connecting strips 303 that are evenly distributed. The axis of the column 3 coincides with the axis of the annular body 1.

[0023] The wind ring 4 is connected to the mounting plate 301 via the first connecting strip 401. The inner side of the wind ring 4 is the inclined connecting part 402 in the middle, the inner side of the wind ring 4 is the windproof part 403, and the outer side of the wind ring 4 is the guide part 404. Along the height direction of the column 3 from top to bottom, the width of the guide part 404 gradually decreases and the width of the windproof part 403 gradually decreases.

[0024] Spring 5 is located between adjacent mounting plates 301, and the bottom end of the lowest spring 5 is connected to the second connecting strip 303.

[0025] Working principle: The external fan pumps airflow into the annular body 1 through the air nozzle 101, then through the ventilation chamber 103 and out through the annular air outlet 102. During the process, the converging ring 2 can constrict the airflow to prevent it from escaping too much. Then the airflow rises and passes through the middle of the air ring 4 to keep the inflated film in a full state. During the process, the wind baffle 403 can block the airflow located on the outside and guide the airflow through the inclined connecting part 402 and finally be guided by the guide part 404 to act directly on the film, which can ensure that the film is inflated quickly.

[0026] As the airflow is transported on the column 3, the width of the windbreak part 403 and the guide part 404 gradually decreases from top to bottom along the height direction of the column 3. The purpose is to compensate for the difference in airflow velocity and avoid the airflow velocity from decreasing the tension on the inner wall of the membrane, which helps the membrane to be rapidly inflated by the airflow.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air outlet mechanism for a blown film machine, characterized in that, include: The annular body (1) has a nozzle (101) at the bottom. The nozzle (101) is used to connect with an external fan. An air outlet (102) is provided on the inner side of the annular body (1). A ventilation cavity (103) is opened inside the annular body (1). The air outlet (102) is connected to the nozzle (101) through the ventilation cavity (103). A gathering ring (2) is formed on the top surface of the annular body (1) surrounding the opening in the middle of the annular body (1); The column (3) is connected to the bottom of the ring body (1). The column (3) is vertically set and a mounting plate (301) is set on the column (3). The column (3) passes through the mounting plate (301) and the mounting plate (301) can move along the height direction of the column (3) to form a sliding pair with the column (3). The top of the column (3) is set with a nut (302) that is threadedly connected to the column (3). The wind ring (4) is connected to the mounting plate (301) via the first connecting strip (401). The inner side of the wind ring (4) is the inclined connecting part (402) in the middle, the inner side of the wind ring (4) is the windproof part (403), and the outer side of the wind ring (4) is the guide part (404).

2. The blown film machine air outlet mechanism according to claim 1, characterized in that: The air outlet (102) is annular.

3. The air outlet mechanism of a blown film machine according to claim 1, characterized in that: It also includes a spring (5) located between adjacent mounting plates (301).

4. The air outlet mechanism of a blown film machine according to any one of claims 1-3, characterized in that: Along the height direction of the column (3), from top to bottom, the width of the guide part (404) gradually decreases.

5. The air outlet mechanism of a blown film machine according to any one of claims 1-3, characterized in that: Along the height direction of the column (3), from top to bottom, the width of the windbreak part (403) gradually decreases.

6. The air outlet mechanism of a blown film machine according to any one of claims 1-3, characterized in that: The bottom end of the column (3) is connected to the ring body (1) by the second connecting strip (303) distributed at equal intervals, and the axis of the column (3) coincides with the axis of the ring body (1).

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